Low-Cost, Multifunctional, and Sustainable Sodium Sulfido Ferrate(II).

We introduce Na[FeS], comprising anionic layers, synthesized by a simple and straightforward solid-state method based on the fusion of binary sulfides of abundant sodium and iron. The structure crystallizes in a trigonal lattice with honeycomb cavities, as well as 25% of statistical iron vacancies in the crystal structure. The compound depicts high dielectric constants from 998 to 1850 at a frequency of 1 kHz depending on the sintering temperature, comparable with benchmark dielectric materials.

A New Family of Layered Metal-Organic Semiconductors: Cu/V-Organophosphonates.

Herein, we report the design and synthesis of a layered redox-active, antiferromagnetic metal organic semiconductor crystals with the chemical formula [Cu(H O) V(µ-O)(PPA) ] (where PPA is phenylphosphonate). The crystal structure of [Cu(H O) V(µ-O)(PPA) ] shows that the metal phosphonate layers are separated by phenyl groups of the phenyl phosphonate linker. Tauc plotting of diffuse reflectance spectra indicates that [Cu(H O) V(µ-O)(PPA) ] has an indirect band gap of 2.

Large-scale synthesis of mixed valence K[FeS] with high dielectric and ferrimagnetic characteristics.

High yields of phase-pure K[FeS] are obtained using a fast, straight-forward, and efficient synthetic technique starting from the binary precursors KS and FeS, and elemental sulphur. The compound indicates soft ferrimagnetic characteristics with magnetization of 15.23 A m kg at 300 K due to the mixed valence of Fe/Fe.

Remarkable Infrared Nonlinear Optical, Dielectric, and Strong Diamagnetic Characteristics of Semiconducting K[BiS].

The ternary sulfido bismuthate K[BiS] is synthesized in quantitative yields. The material exhibits nonlinear optical properties with strong second harmonic generation properties at arbitrary wavelengths in the infrared spectral range and a notable laser-induced damage threshold of 5.22 GW cm for pulsed laser radiation at a wavelength of 1040 nm, a pulse duration of 180 fs, and a repetition rate of 12.

Ground state and stability of the fractional plateau phase in metallic Shastry-Sutherland system TmB.

We present a study of the ground state and stability of the fractional plateau phase (FPP) with M/M = 1/8 in the metallic Shastry-Sutherland system TmB. Magnetization (M) measurements show that the FPP states are thermodynamically stable when the sample is cooled in constant magnetic field from the paramagnetic phase to the ordered one at 2 K. On the other hand, after zero-field cooling and subsequent magnetization these states appear to be of dynamic origin.